Correlations and Coherence at Different Scales (CCDS25)

Electronic correlations in few-layer graphene systems such as rhombohedral ABC graphene or Bernal AB graphene enable novel Stoner and intervalley coherence correlated states. The corresponding order parameters are typically meV strong, similar to the strength of spin proximity effects—spin-orbit coupling and exchange interactions—induced by proximity to transition metal dichalcogenides and van der Waals magnetic semiconductors. I will present several examples of this interplay and outline our theoretical approach, which is based on realistic DFT-based effective single-particle Hamiltonians and generalized RPA susceptibility. In particular, I will demonstrate how the presence of valley-Zeeman spin-orbit coupling in graphene leads to new spin-valley coherence phases in the presence of electron interactions.

I acknowledge support from SPP2244 and SFB 1277.

Y. Zhumagulov et al, Phys. Rev. Lett. 132, 186401 (2025).